Document Detail

Selection for high eight-week body weight in normal and dwarf chickens under high-protein and high-energy diets.
MedLine Citation:
PMID:  7792229     Owner:  NLM     Status:  MEDLINE    
A study was conducted to examine genetic parameters associated with selection for high 8-wk BW in normal and dwarf Athens Canadian randombreds under two nutritional environments (high protein and high energy) and to determine the influence of the selection diet on subsequent water to feed ratios and abdominal fat levels. High-protein lines (HP) received a diet containing 25% CP and 3,100 kcal ME/kg, whereas high-energy lines (HE) received a 22% CP diet containing 3,200 kcal ME/kg. Body weights, selection gains, selection differentials, and heritabilities were similar for normal HP and HE lines. There was evidence, however, that the realized heritability was greater in the HE than the HP dwarf line. Similar selection differentials indicate that this difference was apparently due to the expression of greater genetic variation in the HE dwarf line. Water intake, feed intake, water to feed ratio, and abdominal fat data for the four lines under "selection" and "reciprocal" environments differed between experiments. In Experiment 1, when fed the HE diet, normal birds selected under the HP environment had higher (P < .05) water to feed ratios and lower abdominal fat levels than contemporaries selected under the HE diet. However, these differences were not significant in Experiment 2.
H L Marks
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Poultry science     Volume:  74     ISSN:  0032-5791     ISO Abbreviation:  Poult. Sci.     Publication Date:  1995 Apr 
Date Detail:
Created Date:  1995-07-25     Completed Date:  1995-07-25     Revised Date:  2009-11-19    
Medline Journal Info:
Nlm Unique ID:  0401150     Medline TA:  Poult Sci     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  593-600     Citation Subset:  IM    
USDA, Agricultural Research Service, University of Georgia, Athens 30602-2772, USA.
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MeSH Terms
Adipose Tissue
Body Weight / genetics*,  physiology
Chickens / genetics,  physiology*
Dietary Proteins / administration & dosage*
Dwarfism / physiopathology,  veterinary*
Energy Intake*
Selection, Genetic*
Sex Factors
Time Factors
Reg. No./Substance:
0/Dietary Proteins

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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